Ambrysus amargosus - La Rivers, 1953
Ash Meadows Naucorid
Other English Common Names: Ash Meadows naucorid
Taxonomic Status: Accepted
Related ITIS Name(s): Ambrysus amargosus La Rivers, 1953 (TSN 103618)
Unique Identifier: ELEMENT_GLOBAL.2.118801
Element Code: IIHEM06020
Informal Taxonomy: Animals, Invertebrates - Insects - Other Insects
 
Kingdom Phylum Class Order Family Genus
Animalia Mandibulata Insecta Heteroptera Naucoridae Ambrysus
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Concept Reference
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Concept Reference: Poole, Robert W. and Patricia Gentili (eds.). 1997. Nomina Insecta Nearctica: a checklist of the insects of North America. Volume 4 (non-holometabolous orders). Entomological Information Services, Rockville, MD. Available online at: http://www.nearctica.com/nomina/main.htm
Concept Reference Code: B97POO01EHUS
Name Used in Concept Reference: Ambrysus amargosus
Conservation Status
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NatureServe Status

Global Status: G1
Global Status Last Reviewed: 19Mar2009
Global Status Last Changed: 04Dec1985
Rounded Global Status: G1 - Critically Imperiled
Nation: United States
National Status: N1 (19Mar2009)

U.S. & Canada State/Province Status
Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
United States Nevada (S1)

Other Statuses

U.S. Endangered Species Act (USESA): LT: Listed threatened (20May1985)
U.S. Fish & Wildlife Service Lead Region: R8 - California-Nevada
IUCN Red List Category: NE - Not evaluated

NatureServe Global Conservation Status Factors

Range Extent: <100 square km (less than about 40 square miles)
Range Extent Comments: This species is now restricted to several narrow artificial channels less than 33 ft (10 m) long. Approximately 10 acres (4 hectares) at Point of Rocks Springs are designated critical habitat for the species. There is no current population estimate.

Number of Occurrences: 1 - 5
Number of Occurrences Comments: This species is restricted to Point of Rocks and Kings springs in Ash Meadows National Wildlife Refuge, Nye County, Nevada. It is now extirpated from the Kings Spring system.

Population Size: Unknown
Population Size Comments: There is no current population estimate.

Other NatureServe Conservation Status Information

Distribution
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Global Range: (<100 square km (less than about 40 square miles)) This species is now restricted to several narrow artificial channels less than 33 ft (10 m) long. Approximately 10 acres (4 hectares) at Point of Rocks Springs are designated critical habitat for the species. There is no current population estimate.

U.S. States and Canadian Provinces

Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
Color legend for Distribution Map
Endemism: endemic to a single state or province

U.S. & Canada State/Province Distribution
United States NV

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
NV Nye (32023)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
18 Upper Amargosa (18090202)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: A small aquatic insect approximately 6 mm in length.
Non-Migrant: N
Locally Migrant: N
Long Distance Migrant: N
Riverine Habitat(s): SPRING/SPRING BROOK
Habitat Comments: Prefers the gravel bottom of swift flowing hot springs in a few inches of water. Species is very localized and flightless. Eggs probably attached to pebbles.
Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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Element Ecology & Life History Edition Date: 27Feb1991
Element Ecology & Life History Author(s): SCHWEITZER, D. F.

Zoological data developed by NatureServe and its network of natural heritage programs (see Local Programs) and other contributors and cooperators (see Sources).

References
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  • Menke, Arnold, S. 1979. The Semiaquatic and Aquatic Hemiptera of California. Bull. Calif. Insect Survey 21, Univ. Calif. Press.

  • Poole, Robert W. and Patricia Gentili (eds.). 1997. Nomina Insecta Nearctica: a checklist of the insects of North America. Volume 4 (non-holometabolous orders). Entomological Information Services, Rockville, MD. Available online at: http://www.nearctica.com/nomina/main.htm

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